Powertrain, generic (extended)

P2D15 Exhaust Flow Control Valve C Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2D15 is set when the drive wire of flap C carries too high a level, so the output stage cannot pull it down as commanded. Either the wire touches something live, or the electronics inside the actuator push voltage back onto it. No manufacturer publishes P2D15. Analogies exist for flaps A and B: in its 2024 OBD summary Ford books a short to power as subtype 12 of its continuous driver check, which runs for 5 seconds, while the GM 23OBDG07 tables flag the same fault on an exhaust valve PWM line as P2BFA, with more than 9 V supply once 4 seconds have passed, MIL after the second trip. CARB requires such circuit checks on output devices. A flap that keeps moving or sits fully open although nothing was requested fits this code better than P2D14.

Likely causes

Control wire shorted to a voltage-carrying circuit
Defective electronics in the valve C actuator feeding voltage back
Output stage in the control module stuck high

Symptoms

  • Check engine light
  • Flap C open or moving without being commanded
  • Exhaust sound modes unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

exhaust flow control valve cwiring harnessecm

Related codes

P2D13P2D14P2D16P26C7P2BFA

References: fordservicecontent.com, gsi.ext.gm.com, law.cornell.edu.